Database Develop

white screen after fixed touch screen :(

Hi, i'v got a problem. I tried change my digitizer and, when im done, now lcd doesn't work, because it is still white...:/ What can i do now? any solutions?
Thanks a lot

Check your connections. Pull apart and re-seat everything to ensure everything is hooked up good.

everything is fine :/ still white screen

Perhaps you zapped or damaged the LCD when you were working on it...
You could try replacing the LCD too -- but at this point I think I would send it to the professionals
HTC repair or someone like PPCTechs

Don't know if the screen set up is still the same. But when I replaced the screen on my Universal the wiring for the touchscreen was stuck down onto the lcd wiring, as they both shared common earths. Maybe worth a check before spending more cash?

i have the same problem, the screen was working fine before i replaced the new digitilizer and now its just white but i can hear the tablet playing so it must be the screen.i checked all the wiring 4 times now! any idear???
:crying:

Slide the phone open and apply some pressure near where the angle of the opening is (back of the LCD below the SIM, where there is a bar). I had the same issue and this fixed it.

HD2 Repair

Hey guys,
The USB port of my HD2 broke off and I was forced to replace the motherboard. When I assembled the HD2 again, I could immediately see that there was something wrong with my screen. The screen couldn't display full color (only bright red/orange/white/dark green/cyan accents). Also, the 'hang-up button isn't responding anymore after I replaced the motherboard (and flexcable).
What happened? Is there something wrong with the lcd display or did something go wrong when I (dis)assembled the phone? I took the motherboard and the flexcable from another HD2 that had a broken display.
Thanks in advance.

bilaba70 said:
Hey guys,
The USB port of my HD2 broke off and I was forced to replace the motherboard. When I assembled the HD2 again, I could immediately see that there was something wrong with my screen. The screen couldn't display full color (only bright red/orange/white/dark green/cyan accents). Also, the 'hang-up button isn't responding anymore after I replaced the motherboard (and flexcable).
What happened? Is there something wrong with the lcd display or did something go wrong when I (dis)assembled the phone? I took the motherboard and the flexcable from another HD2 that had a broken display.
Thanks in advance.
Click to expand...
Click to collapse
So you completely voided your warranty through HTC and tried to fix the device yourself, then screwed it up. I'd still say send it to HTC and ask for a repair. I don't know if they'll do it or not, unless you used official parts. I know they do out-of-warranty repairs, but they'll charge you.....

Yep you screwed up the repair, those ribbon cables need a delicate touch & any handfisted moment ends up with what you have got now ...
Another careful strip & inspection of all ribbon connectors is needed ...

I bought it as a second-hand phone. The guy didn't give me a reseat and the HD2 was flashed a WP7 ROM.

For the button problem, how are you turning your phone on without that button? do you hear/feel it click when you press it? If not its just misaligned.the buttons are on a flex ribbon cable with two holes on each side. it fits on the plastic middle frame of the phone which has two small spikes coming out of it... it has to be perfectly placed for your buttons to actually click..
if the flex ribbon is broken however you can buy one off ebay for arround 10$ any will do, mine is not original works fine..
for the screen you could have messed up the lcd, did you separate from the glass-digitizer? if you did you probably screwed it up.. its not a easy thing to do.. also was not necessary for your repairs
the connection to the motherboard might not be all the in and clipped which might cause your problem... (being that two of the little pins provide voltage and ground while all the others provide data information if one of those pins is not in all the way a piece of data might not be displaying for example a color. Never seen that happen its theoretically possible thou)
well I have only opened my phone 3 times and dont claim to be a expert.. but this is my take on it... Good luck!

@pablow Thanks for the detailed response.
The HD2 is only turned on, after I place the battery. Otherwhise it won't start.
I hear a click on the (broken) 'off' button, everytime I press it. I also noticed that the inside of not all of the 'spikes' are empty. I can see a bit of the flexcable in the spike of the broken 'off' button. The spike of the (working) 'call' button is empty.
I think that the flexcable hasn't been connected securely to the motherboard. I'll try connecting everything again tonight.

not that it makes much difference but HTC wouldn't of fixed it through warranty because of usb damage anyway

I thought so, thanks for the heads-up anyways.

[Solved] Display is fixed
Update:
I disassembled the HD2 and reconnected everything (from coax to flexcable). Fortunately it worked! The display is how it should be.
I have another problem now. All of the buttons don't work now, exept for the dial button. Do these buttons break so fast? It's annoying as fuark, because I have to disassemble it another time in the future to fix the buttons.
I also couldn't re-attach the volume control tab when assembling the HD2.

Phone possibly damaged during repair. Screen shows pixel noise.

Hello,
So I broke my screen on my HTC One and decided to repair, having done so before on previous phones I didn't think it would be a problem. Unfortunately upon installing the new screen all I got was a coloured and white pixel noise. Thinking it was a faulty screen I returned it to the supplier and sent off for a new one from a different seller. The new one has exactly the same issue however so now I think I have to conclude it is some sort of hardware issue, possibly caused by static during repair or something along those lines.
The bugger is that there were no issues with the repair itself, it was taken apart carefully and none of the cables damaged, wiggling or otherwise removing and replacing the ribbon cables that are responsible for the LCD has no effect on the noise pattern at all, it remains constant.
I can tell the ROM is running beneath the surface as it has the feature to turn on the flashlight with a long hold power press, and this still works. So the issue is purely with the processing of the image sent to the LCD.
I am unable to test the original LCD as the original cracks cause it to get too badly damaged to work during the original repair.
So I'm basically wondering if there is anything I can do to try and fix this, is there a part I can replace that deals with the LCD image or anything like that? I have a distinct feeling the phone is buggered, but it would be foolish not to ask the community here before sending it to the grave.

I have just discovered a damaged part on the circuit board just behind where the ribbon cable attaches to the mainboard. It is one of the very tiny little black squares, there is a row of 5 and one had a corner that looked damaged and came away when lightly scraped with a tool.
I think this must be the source of the problem, and I would guess means a new mainboard.

New display assembly won't work

HI guys,
I want to post on behalf of a friend who has a problem with his Xperia Z1. He originally bought it used with a broken display, he then changed it with success, the phone was working fine until it fell. At this point the display was still working but not the touchscreen, so he ordered a new assembly from the net (not genuine, like the first one which worked tho).
Upon receiving his new assembly, he immediately started the repair. However, when he turned on the phone, he only felt the vibration and nothing appeared on screen. No any light, he got a totally black display with no sign of life, while the phone was fully charged, and was recognized by Windows (he could even access his files on the memory).
He obviously thought that the seller tricked him and that the assembly was defective but when he tried with the old one (which had the display working but not the touchscreen), the same result showed up, no light, like the assembly wasn't plugged to the motherboard at all.
So far that's what I told him, check the connections to the motherboard, and make sure the flex ribbon is not damaged. He even bought a new ribbon and installed it, with no success.
He read that the problem can come from the display ribbon touching the chassis, thus making a short-circuit, but I doubt it. How if the display connector on the motherboard is broken? Is it fixable? Like buying a brand new connector and soldering it.
Thanks in advance for helping us

Try a hard reboot by Golding vol + and power until phone vibrates. Is the backlight working?

N10AP said:
Try a hard reboot by Golding vol + and power until phone vibrates. Is the backlight working?
Click to expand...
Click to collapse
Thanks for reading this long problem
Sure, he tried the hard reboot thing, he even successfully flashed a stock ROM but nothing changed. I can only think of this as a hardware problem, but what part is defective?
The motherboard connector?
The ribbons on the chassis? But he changed to new ones already!
The LCD assembly? Same, the one he tried is a new one...

Still no one to solve the mystery?
I'd like to add that the phone turns off itself after approximately 30 minutes in idle state. That is, the explorer doesn't show the phone anymore and it has to be powered on again.
I know the best solution would be to buy a new motherboard or just forget about this broken phone, but it's a challenge to fix something that is apparently hopeless

Scree Not Working After Battery Replacement

Hello guys, Yesterday i changed the battery on my phone. After putting everything back together my screen stopped working, with no image and no touch function. The cable on the right bottom is connected but perhaps i damaged it in some way..
The phone is working properly, if I connect it to an HDMI it works.
Any ideas on what I may have done wrong and the solution?
I took it to a shoo and they say I have to replace the whole screen (USD 100 approx) which seems too much..

Check this coil. If it's shorted it's ok, if not make jumper on it. Also check filter (small bricks) under the LCD flex connector and LCD flex itself if it's not teared. Those are common damages which can be done disassembling this phone.

Yup it's the LCD flex that is dammaged.. Is it possible to repair? I'm guessing that on a shop they will want to change the whole LCD screen..

Unfortunately there is no way to change flex only. If it's damaged You have to change whole screen.

Ok, oh well that's life... thanks for the help though!